B048D:06 Code - Auxiliary Heater Temperature Command Circuit Low Voltage/Open
Quick Answer
The Heating, Ventilation, and Air Conditioning (HVAC) Control Module sends a low side pulse width modulation (PWM) signal to request electrical auxiliary heater operation if the interior temperature is too low and additional heat is required. Common causes include Faulty Electrical Auxiliary Heater, Electrical Auxiliary Heater harness is open or shorted, Electrical Auxiliary Heater circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B048D:06 indicates Auxiliary Heater Temperature Command Circuit Low Voltage/Open.
- Common causes
- Common causes include Faulty Electrical Auxiliary Heater, Electrical Auxiliary Heater harness is open or shorted, Electrical Auxiliary Heater circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B048D:06 Description
What are the Possible Causes of the DTC B048D:06?
- Faulty Electrical Auxiliary Heater
- Electrical Auxiliary Heater harness is open or shorted
- Electrical Auxiliary Heater circuit poor electrical connection
- Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
How to Fix the DTC B048D:06?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B048D:06 Auxiliary Heater Temperature Command Circuit Low Voltage/Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B048D:06 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B048D:06 Code
1. What does OBDII code B048D:06 mean?
B048D:06 indicates a low voltage or open circuit issue in the auxiliary heater temperature command circuit, suggesting a problem with its electrical connection or operation.
2. What are the common symptoms of code B048D:06?
Symptoms may include the auxiliary heater not functioning, inefficient cabin heating, or the vehicle's climate control system failing to maintain the desired temperature.
3. What causes the B048D:06 code to trigger?
Common causes include a faulty wiring harness, corroded or loose electrical connections, a defective auxiliary heater control module, or a failed temperature sensor.
4. Can I still drive my car with the B048D:06 code?
Yes, you can typically drive the car, but the auxiliary heater may not operate correctly, potentially affecting cabin comfort, especially in cold weather.
5. How do I diagnose the B048D:06 code?
Start by inspecting the wiring and connectors for damage or corrosion, then use a multimeter to check for proper voltage and continuity in the auxiliary heater temperature command circuit.
6. What tools are needed to fix the B048D:06 code?
You’ll need a multimeter, OBDII scanner, and possibly basic hand tools to inspect and repair wiring or replace faulty components.
7. How can I fix the B048D:06 code?
Repairs may involve cleaning or securing connectors, replacing damaged wiring, or replacing a faulty auxiliary heater control module or temperature sensor.
8. Will clearing the code fix the problem permanently?
No, clearing the code without addressing the root cause will only temporarily remove it. The issue must be diagnosed and repaired.
9. Is the B048D:06 code specific to certain car models?
No, this code can appear on any OBDII-compliant vehicle equipped with an auxiliary heater system, but its exact meaning and repair steps may vary between manufacturers.
10. How much does it cost to repair the B048D:06 code?
Repair costs vary based on the issue, ranging from $50 for simple wiring fixes to $500 or more if the auxiliary heater control module needs replacement.
Discuss the causes and fixes for B048D:06 OBDII Code
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